Gearing.



C! H- NORTON.

v GEARING.

APPLICATION FILED MAY31 1913 I 1,12,434, PatentedSept. 7, 1915.

3 SHEETS-SHEET I.

C. H. NORTON.

GEARING.

APPLICATION FlLED MAY3I. 1913.

L152,%3%. PatentedSept. 7, 1915.

3 SHEETSSHEET 2.

C. H. NORTON.

GEARING.

APPLICATION FILED MAY 31, 1913.

1,15fi84 I PatentedSept. 7, 1915.

m 3 SHEETS-SHEET 3.

CHARLES H. NORTON,

OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO NORTON MASSACHUSETTS.

GEING.

Specification of Letters Patent.

Patented Sept. a, 1915.

Application filed May 31, 1913. Serial No. 771,063.

To all whom it may concern Be it known that T, CHARLES H. NORTON, a citizen of the United States, residing at W'orcester, in the county of \Vorcester and State of Massachusetts, have invented a new and useful Gearing, of which the following is aspecification.

This invention relates to gearing especially designed for the head stock for a grinding machine, and for driving the spindle.

The principal objects thereof are to provide a comparatively simple construction for this purpose which, with the motor for operating it, shall be contained in a single structure, movable as a whole, so that all the parts can beiassembled by the manufacturer and thereafter manipulated as one single element; also to provide an improved speed changing arrangement comprising the combination with the motor drive of a friction clutch operating device arranged for being controlled by the operator of the machine from a convenient point independently of the location of the head stock along the bed.

The invention also involyes improvements in details of contruction and combinations of parts as will appear hereinafter.

Reference is to be had to the accompanying drawings, in which- Figure l is a side view of the head end of a grinding machine showing a preferred embodiment of this invention applied thereto; Fig. 2 is an end view thereof. Fig. 3 is an opposite end view of a portion thereof partly in section on the line 3-3 of Fig. 1; Fig. 4 is a front elevation of an intermediate transmission shaft and connections, with parts shown in longitudinal sectional View; Fig. 5 is a sectional view of the same on the line 5-5 of Fig. 4c; and Fig. 6 is an end view of the solenoid and connected for connecting the clutch.

The invention'is shown as applied to a grinding machine having a bed A and a work table B slidabiy mounted the the usual way. On the ways B o table is mounted a casting C to... base of the head stock sup parts thereof. This is clamped on by a clamp The head stock can along the slide B by means of a. pinion 11, the latter being ope: wrench through go On the head stock trio motor D for operating the parts. This motor is provided with a shaft provided with a wide faced pulley 16 from which a belt 17 extends to a cone pulley 18. Mounted on the head stock C in a notch therein is a bracket 19 to which is pivotally connnected an arm 20 having thereon a pair of idlers 21 engaging the strands of this belt. These idlers hold the belt taut simply by their own weight when the belt is shifted from one step of the cone to another. The belt is shifted by a belt shifter 22.

The cone pulley 18 is made hollow and is provided with an end plate 25 fixed thereto by bolts 26, which bolts carry a part of a series of disks 27 constitutin friction clutch. The rest 0% these disks are carried by a cylinder 28 mounted on a bushing 29. This cylinder is provided with a flange 30 engaging the outside disk. A spring 31 surrounds the shaft 32 upon which the bushing is slidably but not rotatably mounted. his spring normally pushes the bushing'to the left in Fig. 4 and keeps the friction clutch closed. This causes power to be transmitted from the pulley to the shaft 32. For operating this clutch in opposition to the s ring for the purpose of stopping the shaft while the pulley is running, the shaft 32 is provided with a brake plate 33 at the end. This is separated by a leather disk 34 or the like from a plate 35. On this plate is a stud 36, to the ends of which are pivoted the forked ends 37 of the lever having a fulcrum formed by pointed screws 38. -These are mounted on arms projecting from a pivoted arm 39., This lever has a long arm 41 connected with the armature 4.2 of a solenoid 4:3. This solenoid .is connected with a source of power by flexible electrical connections at which are connected with a switch 45 on the front of the bed. This switch is operated by handle -16 which is in convenient position for the operator when he is attending to the other parts of the machine.

he shaft is provided with a pinion i thereon and having clutch teeth 51. pinion meshes with a gear 52 on a e This sleeve is rotatable on a fixed stud 5 and has a gear fired on. it. This .ineshes witl. a gear 53 having clutch teeth 13'? ii .1 on. a shaft 58 in alinement with the L 32. These parts, with the exception of the shafts, locatin a casing 59' on a part of a.

the frame. A clutch 60 is operated by a lever 61 on the front of the casing 59. Thus the shaft 58 can be connected directly with the shaft 32 or through the back gearing described.

The shaft 58 extends into another casing 63 and is provided therein with a worm 64. The end of the shaft can be pressed upon by a screw 65 to take up the end thrust. The worm meshes with a worm wheel 66 on an inclined shaft 67 which is provided Wltll' another worm 68 meshing with a worm Wheel 69 fixed to the work driving plate 70. The center spindle 71 is carried by this work driving plate and is located in a central hub 72. On this hub is a collar 73 on which is carried the arm 39 which supports the end of the shaft 32. In this way a wide range of adjustment of speed is secured by means of the cone pulley, and this range is doubled by the use of the clutch mechanism shown in Fig. 4. Each change by the clutch mechanism, of course, can be made without the trouble of shifting the belt and adjusting the cone pulley.

It will be seen that by the arrangement described a self-contained motor drive for the head stock is provided which can be manipulated readily in a very expeditious manner by the operator of the machine, standing at the front, and furthermore, that by having the parts contained all in a single structure, which is movable by itself independently of the rest of the machine, ad vantages are secured in the manufacture, assembling, and transportation of the device as well as in its ordinary use.

Although I have illustrated and described only a single embodiment of the invention, I am aware of the fact that many modifications can be made therein by any person skilled in the art, without departing from the scope of the invention as expressed in the claims. Therefore, I do not Wish to be limited in these respects, but

What I do claim is 1. In a head stock for a grinding machine, the combination of a base, a motor mounted thereon and having a shaft, a transmission shaft, means for transmitting power from the motor shaft to the transmission shaft, comprising a clutch means for supporting the transmission shaft at its end beyond the clutch, a rod extending through said supporting means for operating said clutch, and means beyond the end of the transmission shaft for moving the rod.

2. In" a head stock for a grinding machine, the combination of, a motor shaft, a transmission shaft, means for transmitting power from the motor shaft to the transmission shaft, comprising a friction clutch means for supporting the transmission shaft at its end, a rod extending through said suppower from the long faced pulley to the cone pulley, a clutch for connecting the second shaft with the cone pulley, a rod extending from the clutch for operating it, and means mounted on the front of said bed for controlling said rod.

4. In a grinding machine, the combination of a bed, a motorhaving a shaft, a shaft parallel with the motor shaft, a long faced pulley on the motor shaft, a cone pulley on the second shaft, means for receiving power from the long faced pulley and transmitting it to the cone pulley, a clutch for connecting the second shaft with the cone pulley, a lever extending from the clutch for operating it, a spindle, means for operating the spindle from said second shaft, and an arm mounted at the end of said spindle for supporting the end of the second shaft.

5. In a grinding machine, the combination with a motor having a shaft, of a second shaft, a cone pulley loose on the second shaft, means for transmitting power from the motor shaft to said pulley, a clutch for connecting the pulley with the second shaft, said clutch having a spring for normally holding the clutch closed, a rod extending from the clutch along the shaft and through the end of the pulley for operating the clutch, and a solenoid for operating said clutch in opposition to the spring to open the clutch and stop the rotation of the second shaft from the motor. I

6. In a grinding machine, the combination of a shaft, a pulley loose thereon, a clutch for connecting the pulley to the shaft, a second shaft in alinement with the first named shaft, means for transmitting power from the first to the second shaft atdifferent speeds, a worm on the second shaft, a third shaft located at an inclination, a worm gear on the third shaft meshing with said worm. a worm on the third shaft, and a plate having a worm gear meshing with the last named worm and rotatable on an axis parallel with the axis of the first named shaft.

7. In a head stock, the combination of a base, a shaft mounted thereon, means on said base for driving said shaft, a second shaft on said base in alinement with the meaaaa first shaft and arranged to be operated thereby, a Worm on the second shaft, a third shaft carried by said base at an inclination and located with its axis transverseto the' aXis of the first shaft, a worm gear on the third shaft meshing with said worm, aworm on the third shaft, and a driven plate mounted on said base on an axis parallel With the axis ofthe first shaft and having a worm gear meshing with the last named Worm.

' 8. The combination with a bed, of a member movable thereon, a motor mou'nted on the member and having a shaft, a long faced pulley on the motor shaft, a second shaft mounted on the movable member parallel with the motor shaft, a cone pulley loose on the second shaft, means for receiving power from the long; faced pulley and transmitting it to the cone pulley, a clutch for connecting the cone pulley with the second 9. In a head stock, the combination of a movable base having bearings thereon, a

7 motor mounted on the base, a shaft mounted in said bearings, a pulley loose on said shaft for receiving power from the motor, a clutch for connecting the pulley with said shaft,a support connected with said base for supporting the end of said shaft at the end of said pulley, and means carried by said base and extending centrally into the end of said pulley for operating the clutch. In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

CHARLES H. NORTQN.

Witnesses FREDK C. BUTTERFIELD, HERBERT JoHNsoN. 

